The price of a dress was first discounted by a certain percent and later by 25 percent of the discounted price. If these
two discounts are equivalent to a single discount of 40 percent of the original price, what was the first discount?

Correct answer marked below

10%

15%

20%

Correct

30%

65%

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What this question tests

Your ability to compute percentage change, percentage of a whole, and to work backwards from a final value.

Treating successive percentage changes as additive — a 10% rise then a 10% fall is not back to the start.

The price of a dress was first discounted by a certain percent and later by 25 percent of the discounted price. If thesetwo discounts are equivalent to a single discount of 40 percent of the original price, what was the first discount?